Method of increasing the volume of tones produced by radio apparatus



Juiy 2L 3925 1,546,920

, L. ssusLAs s METHOD OF INCREASING THE VOLUME OF TONES PRODUCED BY RADIO APPARATUS March '11. 1924 [Ill [mic xlffolway -oip1e holds uall aratus. P

Patented duty .21, 1925;

I UNITED STATES PATENT OFFIQE;

LINN F. IJOUGLASS OF MENLO PARK, CALIFORNIA.

I METHOD OF INCREASING THE VOLUMEOF TONES PRODUCED BY RADIQ AYPABATUS.

Application'flled March 11, 182 4. Serial No. 698,508.

To all whom it may concern:

Be it known thatI, Leon F. Dooenass,

a citizen of the United States, residing at Menlo Park, in the county of San Mateo and State of- California, have-invented new and useful Improvements in the Method of Increasing the Volume of Tones Produced by RadioApparatus, of which the following is a speci cation.

It is well known in science, that if sound waves proceeding from a' source re delayed slightly so that one vibration" follows the other after an interruption of a fraction of .a second, the tone produced by the two vibrations will be considerably re-enforced' and enriched. As a plied to the transmission and receiving 0 sound waves by means of a wirelessror radio apparatus, the printrue, and if the sound waves are de aye a slight period of time either by an ap aratus used to transmit sound waves or y an apparatus used to receive sound vibrations, the tones or sound vibrations may be intensified or strengthened to a considerable degree. The prineiple ofidelaying a sound wave in order to increase the volume thereof and consequently enrich the quality of the produced tone, is utilized in, this invention and with satisfactory results; To secure cumulative effects, and to accumulate the power of a tone or sound, each impulse from a source of sound vibrations must be produced at least twice, the first production of the vibration receding the succeeding vibration by a raction of a second. In utilizing this principle I have rovided a method of delaying each sound v1 ration transmitted or received .by a radio or wireless apparatus, so that each vibration is produced twice, one following the other by a slight period of time, the result bein that the tones reaching the ear are intensi ed and increased to a considerable extent.- 1

This invention relates to a method of increasing the volume of tones produced by wireless or radio a paratus, and pertains in both the transmitting of tones and the receiving of tones by means of the said apparatus.

An object of this invention is to provide" a novel method of increasing the power of tones produced by radio or wireless ap- Another object'of this invention is to provide a method for strengthening and enriching the tones received. by a wireless or radio. apparatus. a

Another object of this invention is to provide a method of intensifying the sound vibrations produced and transmitted by a radio broadcasting or wireless broadcasting apparatus.

In the accompanying drawings forming a part of this a plication:

Fig. 1 is a p an view of the radio apparatusd usediin broadcasting sound vibrations; an

Fig. 2 is a plan view of the apparatus used in receiving the vibrations produced by means of radio or wireless apparatus.

For the sake of clearness and brevity I have omitted the various parts of the broadcasting, apparatus and the various parts of a receiving set, it being sufiicient to disclose only the novel features of my invention,

My invention may be satisfactorily utilized in connection with any radio broadcasting or receiving apparatus, it only being neces- 'sary to provide two connections or leads instead of the one now usually employed.

, Referring to the drawings, A represents a source from which sound vibrationsproceed, 1 represents a wireless or radio transmitter, of the kind commonlyused for broadcasting purposes, and 2 is a horn of approximately fifteen feet in length, and suitable for collecting sounds or tones to be broadcasted. To the transmitter l is at? tachedsuitable conducting leads or wires 3, which are connected and used, in the ordinary manner. Adjacent the horn 2 is placed a smaller horn i of approximately one foot in length which is connected to another transmitter 5 in thesame manner as the first mentioned horn is connected. Suitable leads or connections'6 are attached to the transmitter 5. The purpose of having the horn 2 fifteen times as long as horn 4 is to cause the sound vibrations entering the horn 2 to reach the transmitter 1 approximately one one hundred and fiftieth of a second after thevibrations entering horn 4 reach transmitter 5. The delayed vibration caused by having one horn longer than the other tends to intensify or re-enforce the sounds broadcasted' and although two separate sets of vibrations are produced by the two transmitters, the short interval of time elapsing between the production of the 16 -producer 9 with the receiving set 7 at plug sound by the transmitters, cause them to appear as one and in mu h louder tones The form show-i1 in Fig. 2, represents the form in; invention assumes when applied to a raJo or wireless receiving set. 1 suitable 1 :eiving set 7, ofg'the kind ordinarily used and provided with accommodations for the insertion of two or more plugs to be used for the attachment of reproducers, is connected in the usual manner with any suitable aeriah A born 8 of approximately fifteen feet in length is attached to reproducer 9 which is of the kind commonly used, and suitable wire connections or conductors 10 are used to connect re- 11. Horn 12, of a proximately one foot in length, is attache to reproducer 13, and conductors il -connects 13 with the rece'ving set 7 at plug 15. The length of horn 8 causes the sound vibrations proceeding through the receiving set 7 to reach the ear of the person listening, approxlmately one one hundred and fiftieth of a second after the sound yibrations coming from horn'12 reach the ear. Owing to the fact that there is such a.- short interval of time elapsing between the two vibrations, the ear only discerns one vibration, that .being louder and richer in tone and quality than if one reproducer and horn were used.

The two sets of apparatus herein shown need not both be used at the same time; the' receiving set provided with the two horns herein shown will produce louder tones, whether the broadcasting apparatus be equipped with them or-not, and similarly if the broadcasting apparatus be equipped With-the two horns, the recciving set need not have the horns attached to it iii order to produce a lender or re-enforced tone.

It is evident to those skilled in the art, that any type or shape of horn may be used in carrying out 'my invention without departingfrom the spirit of my invention. It s to be understood in this connection that I may use any size, shape orqualit of horns in carrying out my invention, ancl although it might be practical to have the two horns of different lengths than heroin shown and described, i. is presumed that the same may be done without departing from limits of my invention.

It is evident to those skilled in the art that any means for the collecting or the concentrating of sound waves may be used with success instead of the horns as herein de scribed, and in this connection I desire it to be understood that any sound collecting means may be utilized, without departing from the spirit of this invention.

more than two horns, two transmitters and- A tworeproducers may be used in carrying out in entaon.

.- a respect tothe number of amaze two horns transmitters and re roducers.

A -lherefore I do not desire to be to the use of the exact number of parts as herein shown. I s 7 Having described my invention, what I claim is:

l. The method ofincreasing the volume of tones produced by wireless transmitters, which consists in directing sound vibrationsfrom a source of sound to a' plurality of transmitters, b means of a plurality of horns varying in length. a

'2. The method of re-enforcing sound vibrations produced byradio apparatus which comprises directing sound vibrations to a plurality of wireless transmitters by means of a plurality of horns of varied dimensions positioned between the source of the sound vibrations and the transmitters.

3. The method. ofre-enforcing sound vibrations proceeding from a body to a radio broadcasting apparatus, which comprises directing each of said vibrations to a plurality of transmitters 30 that the said vibrations do not reach the transmitters at the same time, by inter-posing a plurality of horns of various lengths between the saidbody and said transmitters. v p

4. The method of re-enforcing sound vibrations proceeding to a wireless receiving set, which comprises directing sound vibra tions from the said'receiving set by means of a plurality of horns of difierent lengths connected to a plurality of reproducers which are attached to said receiving set.

5. The method of strengthening tones entering a radio receiving set, which comprises directing each tone proceeding through a wireless receiving set to the car by means of a plurality of horns of varied lengths connected to a plurality of reproducers ada ted to receive the soundivibrations procee ing from the said receiving set.

6. The method of re-enforcing sound .vibrations produced through a wireless" receiving apparatus, which comprises directing a plurality of sound vibrations from said apparatus by means of a plurality of horns of different lengths connected to a plurality of reproducing devices attached to said appa'ratus.

. 7 The method of re-enf0rcing and enriching sound vibrations produced through a. ra 1o apparatus whichcomprisesdelaying a plurality of sound vibrations delivered to a plurality of transmitters by interpo'sing a means between I said transmitters and a It is also to be expressly understood that- 8. The method of re-enforcing sound varied invibrations produced by radio a iparatus -which comprises conducting soun vibrations from a body to a plurality of transmitters at unequal intervals by interposing one or more sound collecting means between said transmitters and said body.

9. The method of re-enforoing sound vibrations produced by radio apparatus, which comprises delaying the transmission of the sound vibrations from a plurality of reproducers, by interposing one or more sound conducting means between the said reproducers and the ear.

10. The method of re-enforcing sormd vibrations produced by radio apparatus, which comprises conducting sound vibrations from aplurality of reproducers at un equal intervals by interposing one or more horns between the said reproclucers and the ear.

LEON F. DOUGLASS. 

